WASHINGTON (AP) - The parents of slain Army Ranger and NFL star Pat Tillman voiced concerns Tuesday that the general who played a role in mischaracterizing his death could be put in charge of military operations in Afghanistan. In a brief interview with The Associated Press, Pat Tillman Sr. accused Lt. Gen. Stanley McChrystal of covering up the circumstances of the 2004 slaying. "I do believe that guy participated in a falsified homicide investigation," Pat Tillman Sr. said.